Statistical review of Ontario's Mineral Industry in 1927 - Classes for prospectors - Mines of Ontario in 1927 - Mining accidents in 1927.
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| Typ dokumentu: | Kniha |
| Jazyk: |
angličtina |
| Vydavatel: |
Toronto :
King's Most Excellent Majesty,
1929.
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| Edice: |
Annual report of the Ontario Department of mines ;
Vol. XXXVII, Part I, 1928 |
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